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What Happens in Vegas...
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Old May 9th, 2007, 02:26 PM   #1
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Rendering Options

This is probably a simple question but I'm curious. In Vegas is it better to PRE-render a time-line at the best quality before rendering out as a MPG-2 or is there really no difference from straight rendering to MPG-2 from the time-line?
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Old May 9th, 2007, 05:30 PM   #2
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I see no reason to do a pre-render so I render direct to MPEG-2 from the timeline.
If the video is over 80 min., I'll tweak the bitrate to get the most out of it.
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Old May 9th, 2007, 06:07 PM   #3
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It depends on which format you use for your pre-renders. If it's DV, then there is going to be a colorspace conversion issue.

DV is 4:1:1 and DVD MPEG2 is 4:2:0, if you render MPEG2 from DV, you end up with 4:1:0. 4:1:0 means that you will only have 12.5% of your original DV chroma resolution left on the DVD. Vegas generates all media and titles at full 4:4:4, so if you render directly from the timeline, all generated media and titles will end up at 4:2:0 on the DVD, although DV media will still take the 4:1:0 hit.

That's the long answer, the short answer is render directly from the timeline.

John
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Old May 9th, 2007, 08:47 PM   #4
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No reason to do a pre-render.
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Old May 10th, 2007, 12:44 PM   #5
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Thanks to all for the information. The color space conversion makes particular sense.
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